Method and means for treating granulated material



Dec. 14 1926.

8 9 0., 1. l. 6?, l R E N R O B L 0.

2 S'heets-Sheet Eur Z METHOD AND MEANS FOR TREATING GRANULATED MATERIAL Filed Sept. 7, 1923 .VG up' l O. L. BORNER v METHOD AND MEANS FOR TREATING GRANULATED MATERIAL Filed sept. 7, 1925 2 sheets-Sheet 2 fis Patented Dec. 14, 1926.

UNITED STATES OTTO LEO BORNEB, F ZURICH,` SWITZERLAND, ASSIGNR OFUONE-HALFITO ADOLF v 'BORNEIM OF WALLENSTADT, SWITZERLAND. i i

METHOD AND yiiirziiiisroia. 'rnnA'rINe enANiiLiirnn MATERIAL.

' Application led September 7, 1923, Serial No. 661,512, and vin Germany ySeptember 14, M22-" I-IitliertoA it has been customary, in some cases for the Vpurpose of drying, roasting or otherwise treating materials ofjgranulated or pulverized shape to move such materials in a zig-zag path by means oi. rakes and the'like over plates made of box section for thepurpose of heating the material thereon, or thecasing, which had a? horizontal shaft was given an oscillatory motion vertical to suchshaft and to the path ofthe material and the shape ofl the surface' over 'which the material moved was concave. Further, lt'has been customary in other cases to form a conduit of plates arranged in zigzag fashion -in a casing 'which was given vertical motion and the wedge shaped spaces left between the bends of theconduit werek provided with heating arrangements,- Constructions consistin drying shelves set-iin motion similar to the motion of a trough conveyor, are also known.

All these arrangements have disadvantages. In the first case movingparts ot the apparatus are arranged in' the same space whiclicontainsfthe material -to be treated and -theseparts are thus subjected to the infiuence `ot"dampness,"heat, dust etc. and

'sutfercorr spondingly. In the second case? described i is necessary that the planes be arranged at a vsomevvhatacute angle in'ord'er toniake it possible for the material toybe set in motion. thereby.' Itis further to be observed that,

with referencetoV a section transverse to theV main movement ofl the material a pronounced mixing Aaction takes place whichA makesitimpossible, for example, to treat the centre portion of the material 4differ-.frv

ently `from thatl portion which 'moves yat the edges.- It is therefore'impossible to un-r equivocally define the treatment of the moving material. In thei'third case, it is.

necessary to arrange the planes over which Ythe material travels at acute angles. Also,

vthe method andV apparatus forming the subject-matter of the present invention.

of a seriesi'of heated Considerable space is wasted.

According to this invention the material- 'to be treated is caused to move over plates arranged oneabove the' other, lin a casing,

which is given oscillatory motion in the direction ofthe path of the material similar to theinot'ion of trough conveyors, or, the plates are given oscillatory Vmotion'in a fixed casing, in which they are, however, so arranged. that they also forni conduits closed I on all sides and connected together. Whilst the tliermical or chemical means for treating the vmaterial are moving vinthe same system of conduits or in a separate system in the opposite direction to thel'mov- Y i.

Ving materials. The surfaces vover'v which the materials move'may be planes so arrange'dthat the material moves in the forni ofa ,cascade or theyv may be ot helical shape. "In the irstfcase the path ofthe oscillatory movement as viewedfrom above is a straight line', inY the second case it is part of a circle.

, In the' drawing various constructions are:

shown diagramniaticallyV whereby the in-j.

vention can be put into effect.

l Fig.v 1 shows a verticalvsection of an ap- Y paratus wherein the path'of movement is a straight line. n Y o,

Fig. 2 is a section on the line G I-I of. .Fia .Y Figs. 3 vand 4 are views of modifications embodyingwith box shaped plateswhcreof Fig. 4 is a section on'the line J KA of Fig; 3. Figs; 5 and 6' are vertical and horizontal ploying helical plates.

covered' conduits. y

Fig. 8 is a sectional view of an apparatus Whereinthe'plates are arranged in staggered relation. o i

Fig. 9 is a vertical section of a modifiedk form of the apparatus. t

sections respectively of an apparatus em! ce Fig. k7 is a- 4modification employingwitlr l' Fig. 10 isa view similar to Fig. 9 but show v `ing a. fire-grate as the means for producing 16,) o

the, heat. 'o

Figs. 11 and 12 show the vertical and horizontal section of a cylindrically shaped apparatus.

Referring to Figs. 1 and 2; 24 represents a casing which rests on segments mounted to rock on shafts 26. TheV segments are horizontally oscillated on the shafts 26 by means `of a lever 27 and a vconnecting rod 28. Plates 1, 1*, 1f, l, and 1h, are alternatel fixed 'ony the front and ,back wall ofthe casing 24 andv vided, which may he in the form of a nozzlek for hot air, steam or gas or an arrangement for producing either of these. The top of the casing 24 contains an outlet for air, steam, gases etc.

The plates need be inclined only to a slight "i" extent, that is to say, may be Substantially -a prescribed movement.

horizontal, as understood in the case of ,trough conveyors.

A. second arrangement is shown in Figs. 3

- and 4. The plates 1, 1m, and 1P are box-like'- in cross section and the hollow spaces'vrliicli may be used for the passage of a heating .nedium nr the like are interconnected by conduits 31.Y This arran ement will be ot advantage in cases where eating media and material under treatment may not intermingle.v Chemical gases or the like may be admitted or led away through tubes 32.

In Figs. 5 and 6 an inner drum 1 is shownas arranged in an outer casing 2. In 4the annular space so formed is ari'angeda helical plate 3, which has closecontact with the two drums 1 and 2. The helical platel may be of the single or multiple thread type. The shaft 7 is fixed to the inner drum 1 by means of arms 4. The Whole a paratusk may be lgiven horizontal motion y means -of crank 8, whereby the centre of gravity ot the whole system may be at rest or mayinake For instance, the shaft 7 may be hollowy and movable on the shaft 5, so that the whole system not only is 1in oscillation horizontally but also vertical According to Fig. 7, the plates 3 which are also fitted betweenV the cylinders 1 and 2 are covered by a plate 3a. 'Y

In Fig. 8 an arrangement is shown where the plates are divided into sections3b, 3, 3",

3*,vwhich together may form a singleor multiple thread.

The materials to be treated are fed on to the uppermost part of the plates and are caused to .travel in a downward directionby the oscillatory motion of thewhole arrangementv and at the same time chemicalV or thermical medias are caused to move in the opposite direction. Accordingy to Figs. 1, 2, 5, 6, and 8, the treatment is a direct one,

to and fro. The plates Z2 and the casing c are madeV of fire resisting material or covered with such material. The material to be treated isfed into the. apparatus at d. ByY

aid of a nozzle e or thelike, oil or pulverised coal for combustion are delivered within the apparatus. at af.

Fig. 10 shows an arrangementsiniilar toV that shown in Fig. 9, but with a fire grated!) builtunderneatli the casing. The gases from the furnace enter the casing'at f.

a and a2. The whole casing rests on balls c..

Figs. 11 and 12 show a cylindrical appara-VV The gases leave the apparatus 4 The material is :ted into the casing at d and g the gases leave it at Claims. i Y, 1. The method of drying, roasting, burning, or otherwise therinically or chem'icallgyY treating pulveri'zed or granulated materials which comprises causing the material underv treatment to move over superimposed platesY having an oscillatory motion in the direction of the path of `movement of the material so j under treatment and forming interconnected y conduits closed'on all sides, and concurrently causing media for acting on the` material to travel in a path opposite topthat in which the material under treatment moves.

. 2. Means for carrying into effect the meth.VA od according to claim l comprising a casing, 'p means therein forming Aal conduit having superimposed portions, said conduitrbeing closed o n all sides, means for imparting anY oscillatory motion to said conduit-forming means in the directionlxof the path of the material under treatment, `and means for causing media used. `for thermical or chemical treatmentV of thematerial to move in the path of the-materialfunder treatment.

3. Means according to claim 2, wherein the conduit-forming means Vis spirally arranged.; In testimony. whereof I have hereunto setVV my hand.

oTTo Liao BoRNER. 

